#0  0x00007f0bc13caf58 in IA__g_type_check_instance_cast (type_instance=0x963870, iface_type=80)
#1  0x0000000000408ab6 in update_switcher_window (win=0x912160, selected=<value optimized out>) at main.c:3256
  3251: 
  3252:     ws->switcher_pixmap = pixmap;
  3253:     ws->switcher_buffer_pixmap = buffer_pixmap;
  3254: 
  3255:     ws->switcher_width = width;
  3256:     ws->switcher_height = height;
  3257: 
  3258:     g_object_ref (G_OBJECT (pixmap));
  3259:     g_object_ref (G_OBJECT (buffer_pixmap));
  3260: 
  3261:     d->pixmap = pixmap;
#2  0x000000000040fba4 in event_filter_func (gdkxevent=<value optimized out>, event=<value optimized out>, 
#3  0x00007f0bc2ab615c in gdk_event_apply_filters (xevent=0x7fffcb93ed60, event=0x9a6c40, filters=<value optimized out>)
#4  0x00007f0bc2ab7806 in gdk_event_translate (display=0x644110, event=0x50, xevent=0x7fffcb93ed60, return_exposes=0)
#5  0x00007f0bc2ab9152 in _gdk_events_queue (display=0x644110) at /build/buildd/gtk+2.0-2.12.9/gdk/x11/gdkevents-x11.c:2285
  [Error: /build/buildd/gtk+2.0-2.12.9/gdk/x11/gdkevents-x11.c was not found in source tree]
#6  0x00007f0bc2ab956e in gdk_event_dispatch (source=<value optimized out>, callback=0x50, user_data=0x2)
#7  0x00007f0bc0d12262 in IA__g_main_context_dispatch (context=0x6535c0) at /build/buildd/glib2.0-2.16.2/glib/gmain.c:2019
  [Error: /build/buildd/glib2.0-2.16.2/glib/gmain.c was not found in source tree]
#8  0x00007f0bc0d15516 in g_main_context_iterate (context=0x6535c0, block=1, dispatch=1, self=<value optimized out>)
#9  0x00007f0bc0d157d7 in IA__g_main_loop_run (loop=0x8f9240) at /build/buildd/glib2.0-2.16.2/glib/gmain.c:2852
  [Error: /build/buildd/glib2.0-2.16.2/glib/gmain.c was not found in source tree]
#10 0x00007f0bc2e4fee3 in IA__gtk_main () at /build/buildd/gtk+2.0-2.12.9/gtk/gtkmain.c:1163
  [Error: /build/buildd/gtk+2.0-2.12.9/gtk/gtkmain.c was not found in source tree]
#11 0x000000000041076f in main (argc=1, argv=0x7fffcb93f148) at main.c:5648